Lilliput 619 problems

I installed a 619 Lilliput monitor into an Escalade molded into the dash which worked fine for a while until it kept on falling out of calibration constantly.

After replacing the monitor, it worked fine for a while until recently it's doing the same thing. I've reloaded the drivers, same thing. I've opened to monitor to check if it's sitting in correctly since the mouse cursor constantly moves to the left of the screen. Looks fine. I dunno what could be wrong.